Task::mute

public function mute($id)
{
	if (!TaskAccessController::can($this->userId, ActionDictionary::ACTION_TASK_READ, (int)$id))
	{
		$this->addForbiddenError();

		$result = new UtilResult();
		$result->loadErrors($this->errors);
		return $result;
	}

	return UserOption::add($id, UtilUser::getId(), UserOptionOption::MUTED);
}